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Method for measuring basic magnesium chloride in anhydrous magnesium chloride particles

An anhydrous magnesium chloride and a determination method are applied in the field of determination of basic magnesium chloride in anhydrous magnesium chloride particles, which can solve the problems of large data error, inconvenient refinement control and the like, and achieve the effect of high precision

Inactive Publication Date: 2018-09-04
ЦИНХАЙ СОЛТ ЛЕЙК ИНДАСТРИ ГРУП КО ЛТД
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Problems solved by technology

[0011] But when these two kinds of methods are very low to basic magnesium chloride content, the data error of determination is bigger, brings inconvenience for refined control

Method used

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  • Method for measuring basic magnesium chloride in anhydrous magnesium chloride particles
  • Method for measuring basic magnesium chloride in anhydrous magnesium chloride particles
  • Method for measuring basic magnesium chloride in anhydrous magnesium chloride particles

Examples

Experimental program
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Effect test

Embodiment 2

[0038] In Example 2 of the present invention, a method for determining basic magnesium chloride in anhydrous magnesium chloride particles comprises the following steps:

[0039] S1: Take by weighing 5.1000g of anhydrous magnesium chloride particles and place them in a 250ml iodine measuring bottle, then accurately add a hydrochloric acid solution with a concentration of 15ml0.05mol / L. rinse with liquid, and then cool the solution to room temperature;

[0040] S2: adding 12ml concentration to the solution is the Na of 0.025mol / L 2 S 2 o 3 3 solution, then shake well;

[0041] S3: Then add 3ml volume of KI-KIO to the solution 3 solution;

[0042] S4: Then immediately use Na with a concentration of 0.025mol / L 2 S 2 o 3 The solution is titrated until a light yellow color appears in the solution;

[0043] S5: then add 1ml starch indicator to the solution;

[0044] S6: continue titration until the solution becomes colorless, and keep for 15s;

[0045] S7: do blank test ac...

Embodiment 3

[0049] In embodiment 3 of the present invention, a kind of assay method of basic magnesium chloride in anhydrous magnesium chloride granule comprises the following steps:

[0050] S1: Take by weighing 5.0000g of anhydrous magnesium chloride granules and place them in a 250ml iodine volumetric bottle, then accurately add a hydrochloric acid solution with a concentration of 15ml0.05mol / L, and after the granules are completely dissolved, use a small amount of first-grade water on the bottle wall rinse with liquid, and then cool the solution to room temperature;

[0051] S2: adding 10ml concentration to the solution is the Na of 0.025mol / L 2 S 2 o 3 3 solution, then shake well;

[0052] S3: Then add 2ml volume of KI-KIO to the solution 3 solution;

[0053] S4: Then immediately use Na with a concentration of 0.025mol / L 2 S 2 o 3 The solution is titrated until a light yellow color appears in the solution;

[0054] S5: then add 1ml starch indicator to the solution;

[0055] S...

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Abstract

The invention discloses a method for measuring basic magnesium chloride in anhydrous magnesium chloride particles. Magnesium oxide is present in an electrolyte in a suspension state; part of magnesiumbeads are entrained into slags by the magnesium oxide; the magnesium oxide deposited on a working surface of a cathode makes the magnesium beads hard to aggregate and grow on a cathode surface so that the magnesium beads are excessively scattered to increase the chance of secondary reaction and seriously affect a cathode process; in industry, the method for detecting basic magnesium chloride comprises a water-soluble acid dissolving method and an alcohol dissolving method; however, when the content of basic magnesium chloride is very low, the two methods have relatively large error in measured data, thereby bringing inconvenience to fine control; the method provided by the invention utilizes chemical reaction and a titration method, that is, basic magnesium chloride reacts with quantitative hydrochloric acid, then excessive acid reacts with KI-KIO3 to form iodine, the iodine reacts with sodium thiosulfate, starch is used as an indicator for titration, and the whole process is called an iodometric method; and the iodometric method can detect a trace amount of basic magnesium chloride in anhydrous magnesium chloride with relatively high precision.

Description

technical field [0001] The invention relates to the field of determination methods for basic magnesium chloride in anhydrous magnesium chloride granules, in particular to a method for determining basic magnesium chloride in anhydrous magnesium chloride granules. Background technique [0002] Qinghai Chaerhan Salt Lake is the largest chloride-type potassium-sodium-magnesium salt deposit in China. It has the characteristics of large reserves, high grade, complete types, relatively concentrated distribution, and good resource combination. Among them, the reserves of sodium chloride are 55.5 billion tons, and potassium chloride It has reserves of 150 million tons, 4.9 billion tons of magnesium chloride, and abundant national strategic resources such as lithium, rubidium, and cesium. It is the most valuable salt lake in China, with a potential economic value of more than 12 trillion yuan. [0003] Most of the old brine produced by potash fertilizer enterprises in the Chaerhan are...

Claims

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Application Information

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IPC IPC(8): G01N31/16G01N31/22
CPCG01N31/16G01N31/22
Inventor 朱红卫党国元海显鹍哈权章
Owner ЦИНХАЙ СОЛТ ЛЕЙК ИНДАСТРИ ГРУП КО ЛТД
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